3fe0: 76f72048 76f72038 00018bf8 0004b480 r10:00000036 r9:835d2000 r8:80200224 r7:00000036 r6:00000000 r5:00000000 r4:00000000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6692 at block/genhd.c:617 __device_add_disk+0x5e8/0x698 block/genhd.c:617 Modules linked in: Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6692 Comm: syz-executor.1 Not tainted 5.12.0-rc3-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81802550>] (dump_backtrace) from [<818027c4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252) r7:00000080 r6:60000193 r5:00000000 r4:82b58344 [<818027ac>] (show_stack) from [<81809e98>] (__dump_stack lib/dump_stack.c:79 [inline]) [<818027ac>] (show_stack) from [<81809e98>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120) [<81809de0>] (dump_stack) from [<81803358>] (panic+0x130/0x378 kernel/panic.c:231) r7:81f48198 r6:82a390a4 r5:00000000 r4:82c6b0d0 [<81803228>] (panic) from [<802446f4>] (__warn+0xb0/0x164 kernel/panic.c:605) r3:82a2248c r2:00000000 r1:821137b8 r0:81f48198 r7:00000269 [<80244644>] (__warn) from [<81803608>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:628) r7:807b251c r6:00000269 r5:81f9dbf0 r4:00000000 [<818035a4>] (warn_slowpath_fmt) from [<807b251c>] (__device_add_disk+0x5e8/0x698 block/genhd.c:617) r8:8384def8 r7:00000000 r6:00000000 r5:8384de80 r4:866f0400 [<807b1f34>] (__device_add_disk) from [<807b25e0>] (device_add_disk+0x14/0x18 block/genhd.c:639) r10:ffffffff r9:866f0400 r8:00000000 r7:833ba8c8 r6:835d3ee4 r5:00000000 r4:8476a000 [<807b25cc>] (device_add_disk) from [<80a4b964>] (add_disk include/linux/genhd.h:231 [inline]) [<807b25cc>] (device_add_disk) from [<80a4b964>] (loop_add+0x208/0x28c drivers/block/loop.c:2172) [<80a4b75c>] (loop_add) from [<80a4be10>] (loop_control_ioctl drivers/block/loop.c:2268 [inline]) [<80a4b75c>] (loop_add) from [<80a4be10>] (loop_control_ioctl+0xb4/0x1c0 drivers/block/loop.c:2250) r10:84544960 r9:00000003 r8:86b81140 r7:00000000 r6:00000000 r5:00004c80 r4:00000000 [<80a4bd5c>] (loop_control_ioctl) from [<804f33f4>] (vfs_ioctl fs/ioctl.c:48 [inline]) [<80a4bd5c>] (loop_control_ioctl) from [<804f33f4>] (do_vfs_ioctl fs/ioctl.c:725 [inline]) [<80a4bd5c>] (loop_control_ioctl) from [<804f33f4>] (__do_sys_ioctl fs/ioctl.c:751 [inline]) [<80a4bd5c>] (loop_control_ioctl) from [<804f33f4>] (sys_ioctl+0x120/0xaa4 fs/ioctl.c:739) r6:86b81141 r5:00000000 r4:00004c80 [<804f32d4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64) Exception stack(0x835d3fa8 to 0x835d3ff0) 3fa0: 00000000 00000000 00000003 00004c80 00000000 00000000 3fc0: 00000000 00000000 00000000 00000036 7ee80332 76f726d0 7ee804ac 76f7220c 3fe0: 76f72048 76f72038 00018bf8 0004b480 r10:00000036 r9:835d2000 r8:80200224 r7:00000036 r6:00000000 r5:00000000 r4:00000000 Rebooting in 86400 seconds..